dotfiles/config/.config/nvim/lua/lsp.lua

-- 1. Configure CiderLSP
local nvim_lsp = require("lspconfig")
local configs = require("lspconfig.configs")
configs.ciderlsp = {
  default_config = {
    cmd = { "/google/bin/releases/cider/ciderlsp/ciderlsp", "--tooltag=nvim-lsp", "--noforward_sync_responses", "--enable_semantic_tokens", "--relay_mode=true", "--hub_addr=blade:languageservices-staging" ,"--enable_document_highlight"},
      -- cmd = {'/google/bin/releases/cider/ciderlsp/ciderlsp', '--forward_sync_responses', '--enable_document_highlight'};
    filetypes = { "c", "cpp", "java", "kotlin", "proto", "textproto", "go", "python", "bzl" },
    root_dir = nvim_lsp.util.root_pattern("BUILD"),
    settings = {},
  },
}

local has_words_before = function()
  local line, col = unpack(vim.api.nvim_win_get_cursor(0))
  return col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match("%s") == nil
end

-- 2. Configure CMP
vim.opt.completeopt = { "menu", "menuone", "noselect" }

-- Don't show the dumb matching stuff
vim.opt.shortmess:append("c")

local lspkind = require("lspkind")
lspkind.init()

local cmp = require("cmp")

cmp.setup({
  mapping = {
    ["<C-d>"] = cmp.mapping.scroll_docs(-4),
    ["<C-u>"] = cmp.mapping.scroll_docs(4),
    ["<C-e>"] = cmp.mapping.close(),
    ["<C-Space>"] = cmp.mapping(cmp.mapping.complete(), { "i", "c" }),
    ["<C-m>"] = cmp.mapping.confirm({ select = true }),
    ["<CR>"] = cmp.mapping.confirm({ select = true }),
    ["<Tab>"] = cmp.mapping(function(fallback)
    if cmp.visible() then
      cmp.select_next_item()
    elseif vim.fn["vsnip#available"](1) == 1 then
      feedkey("<Plug>(vsnip-expand-or-jump)", "")
    elseif has_words_before() then
      cmp.complete()
    else
      fallback() -- The fallback function sends a already mapped key. In this case, it's probably `<Tab>`.
    end
  end, { "i", "s" }),

  ["<S-Tab>"] = cmp.mapping(function()
    if cmp.visible() then
      cmp.select_prev_item()
    elseif vim.fn["vsnip#jumpable"](-1) == 1 then
      feedkey("<Plug>(vsnip-jump-prev)", "")
    end
  end, { "i", "s" }),

    ["<Up>"] = cmp.mapping(function(fallback)
    if cmp.visible() then
      cmp.select_prev_item()
    elseif vim.fn["vsnip#available"](1) == 1 then
      feedkey("<Plug>(vsnip-jump-prev)", "")
    else
      fallback() -- The fallback function sends a already mapped key. In this case, it's probably `<Tab>`.
    end
  end),

    ["<Down>"] = cmp.mapping(function(fallback)
    if cmp.visible() then
      cmp.select_next_item()
    elseif vim.fn["vsnip#available"](1) == 1 then
      feedkey("<Plug>(vsnip-expand-or-jump)", "")
    else
      fallback() -- The fallback function sends a already mapped key. In this case, it's probably `<Tab>`.
    end
  end),
  },

  sources = {
    { name = "nvim_lua" },
    { name = "nvim_lsp" },
    { name = "path" },
    { name = "vim_vsnip" },
    { name = 'nvim_ciderlsp', priority = 9 },
    { name = "buffer", keyword_length = 5 },
  },

  sorting = {
    comparators = {
      cmp.config.compare.offset,
      cmp.config.compare.exact,
      cmp.config.compare.score,

      function(entry1, entry2)
        local _, entry1_under = entry1.completion_item.label:find("^_+")
        local _, entry2_under = entry2.completion_item.label:find("^_+")
        entry1_under = entry1_under or 0
        entry2_under = entry2_under or 0
        if entry1_under > entry2_under then
          return false
        elseif entry1_under < entry2_under then
          return true
        end
      end,

      cmp.config.compare.kind,
      cmp.config.compare.sort_text,
      cmp.config.compare.length,
      cmp.config.compare.order,
    },
  },

  snippet = {
    expand = function(args)
      vim.fn["vsnip#anonymous"](args.body)
    end,
  },

  formatting = {
    format = lspkind.cmp_format({
      with_text = true,
      maxwidth = 40, -- half max width
      menu = {
        nvim_ciderlsp = "(ﮧ)",
        buffer = "[buffer]",
        nvim_lsp = "[CiderLSP]",
        nvim_lua = "[API]",
        path = "[path]",
        vim_vsnip = "[snip]",
      },
    }),
  },

  experimental = {
    native_menu = false,
    ghost_text = true,
  },
})

vim.cmd([[
  augroup CmpZsh
    au!
    autocmd Filetype zsh lua require'cmp'.setup.buffer { sources = { { name = "zsh" }, } }
  augroup END
]])

-- 3. Set up CiderLSP
local on_attach = function(client, bufnr)
  vim.api.nvim_buf_set_option(bufnr, "omnifunc", "v:lua.vim.lsp.omnifunc")
  if vim.lsp.formatexpr then -- Neovim v0.6.0+ only.
    vim.api.nvim_buf_set_option(bufnr, "formatexpr", "v:lua.vim.lsp.formatexpr")
  end
  if vim.lsp.tagfunc then
    vim.api.nvim_buf_set_option(bufnr, "tagfunc", "v:lua.vim.lsp.tagfunc")
  end

  local opts = { noremap = true, silent = true }
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>rn", "<cmd>lua vim.lsp.buf.rename()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>ca", "<cmd>lua vim.lsp.buf.code_action()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "L", "<cmd>lua vim.lsp.buf.hover()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "g0", "<cmd>lua vim.lsp.buf.document_symbol()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "gW", "<cmd>lua vim.lsp.buf.workspace_symbol()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "gd", "<cmd>lua vim.lsp.buf.definition()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "gD", "<cmd>tab split | lua vim.lsp.buf.definition()<CR>", opts)
  -- vim.api.nvim_buf_set_keymap(bufnr, "n", "gD", "<cmd>lua vim.lsp.buf.declaration()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "gi", "<cmd>lua vim.lsp.buf.implementation()<CR>", opts)
  -- vim.api.nvim_buf_set_keymap(bufnr, "n", "gr", "<cmd>lua vim.lsp.buf.references()<CR>", opts)  -- diagnostics controls references
  vim.api.nvim_buf_set_keymap(bufnr, "n", "<C-g>", "<cmd>lua vim.lsp.buf.signature_help()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "i", "<C-g>", "<cmd>lua vim.lsp.buf.signature_help()<CR>", opts)

  vim.api.nvim_buf_set_keymap(bufnr, "n", "gt", "<cmd>lua vim.lsp.buf.type_definition()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "[g", "<cmd>lua vim.diagnostic.goto_prev()<CR>", opts)
  vim.api.nvim_buf_set_keymap(bufnr, "n", "]g", "<cmd>lua vim.diagnostic.goto_next()<CR>", opts)

  vim.api.nvim_command("augroup LSP")
  vim.api.nvim_command("autocmd!")
  if client.resolved_capabilities.document_highlight then
    vim.api.nvim_command("autocmd CursorHold  <buffer> lua vim.lsp.buf.document_highlight()")
    vim.api.nvim_command("autocmd CursorHoldI <buffer> lua vim.lsp.buf.document_highlight()")
    vim.api.nvim_command("autocmd CursorMoved <buffer> lua vim.lsp.util.buf_clear_references()")
  end
  vim.api.nvim_command("augroup END")
end


local capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol.make_client_capabilities())

capabilities = require('cmp_nvim_ciderlsp').update_capabilities(capabilities)

-- capabilities.textDocument.codeAction = {
--     codeActionLiteralSupport = {
--         codeActionKind = {
--             valueSet = {
--                 '', 'quickfix', 'refactor', 'refactor.extract', 'refactor.inline', 'refactor.rewrite', 'source', 'source.organizeImports'
--             }
--         }
--     }
-- }
-- capabilities.textDocument.publishDiagnostics['versionSupport'] = false

nvim_lsp.ciderlsp.setup({
  capabilities = capabilities,
  on_attach = on_attach,
})